diff --git a/x11-themes/arc-darkest-colors/metadata.xml b/x11-themes/arc-darkest-colors/metadata.xml
index 5b09564e5d..1e0f03c7e3 100644
--- a/x11-themes/arc-darkest-colors/metadata.xml
+++ b/x11-themes/arc-darkest-colors/metadata.xml
@@ -5,7 +5,7 @@
 		<email>gentoo@tastytea.de</email>
 		<name>Ronny (tastytea) Gutbrod</name>
 	</maintainer>
-	<longdescription>
+	<longdescription lang="en">
 		Arc-Darkest-COLORS is a flat, dark-mode theme with transparent elements,
 		for GTK, xfwm4, openbox-3, GNOME-Shell, and Cinnamon desktop
 		environments. Arc-Darkest-COLORS also has two varieties of matching